Rep. Michael McCaul says Boston attack has ‘all the hallmarks of an act of terrorism’

Texas Rep. Michael McCaul, chairman of the House Homeland Security Committee, said the bomb attack at the Boston Marathon “has all the hallmarks of an act of terrorism. ”

Appearing on Fox News, the Austin Republican called for national unity and repeated the sentiments of President Obama: “Today, we are not Democrats or Republicans. We are all Americans united against terrorism.”

The Homeland Security Committee chair say he received a call at about 4:30 CDT from the White House to brief him on the attack, which he called “a huge tragedy.”

McCaul said some evidence found at the crime scene, including ball bearings, were signs of well-planned terrorist action. But, he added, “We don’t know who’s behind it at this time and we don’t have all the evidence.”